Thank, Cheyenne, I was following instruction in that link by kenjennings, and was using SqLite3 to fix device SN, have not go through for me, after restoring "fixed" file to another PE, got this message "Invalid Backup file - There was an error verifying your back up file. Please, try again latter." But all files are perfectly visible on PC. New PE just not see files in sdcard folder... After I removed . before folder name on PC, and opened it from usb-flash on new PE, all files are visible. I was able to add journals to new library and update/rename them. I don't have a lot of Journals, so this works and this is comforting to know that data can be saved.